Imagine cooking a stew with a single ingredient or growing a country garden with a single type of flower. One-dimensional efforts like these yield bland and boring results. Now imagine staffing a data science team with only PhDs in machine learning. In spite of the impressive pedigree, the result would be similar: bland, boring, and, possibly worse, ineffective.
Programming since 1972. I made the "mistake" of studying AI in grad school at Stanford a few decades ago; perseverance pays off :)
Sometimes an author and more often a speaker/instructor, in a lot of venues, although even more often working as an engineering director or consultant.
"One of the cornerstones of Modern Mass Weirdness in the late 20th Century" - Ivan Stang.